Use of the polymerase chain reaction in the diagnosis of acquired ocular toxoplasmosis in an immunocompetent adult.

Gene amplification by the polymerase chain reaction (PCR) is useful in ophthalmic diagnosis since it enables exceedingly small amounts of nucleic acid to be detected in ocular samples. Studies have indicated a potential for the use of PCR on ocular specimens to assist the clinical diagnosis of ocular toxoplasmosis.' We describe a case in which the technique was used in the diagnosis of acquired ocular toxoplasmosis in an immunocompetent adult.